[U-Boot] [PATCH 1/2] ARM: am33xx: Fix DDR init delay placement

[Russ Dill]

The delay needs to be before the write to ref_ctrl register
which initiates refreshes. An improper initialization sequence
generates an L3 noc error.

Signed-off-by: Russ Dill <Russ.Dill at ti.com>
---
 arch/arm/cpu/armv7/am33xx/ddr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv7/am33xx/ddr.c b/arch/arm/cpu/armv7/am33xx/ddr.c
index 888cf1f..ef1fc4d 100644
--- a/arch/arm/cpu/armv7/am33xx/ddr.c
+++ b/arch/arm/cpu/armv7/am33xx/ddr.c
@@ -120,12 +120,15 @@ void config_sdram_emif4d5(const struct emif_regs *regs, int nr)
 
 	writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
 	writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
+
+	/* Wait 1ms because of L3 timeout error */
+	udelay(1000);
+
 	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
 	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
 
 	/* Perform hardware leveling for DDR3 */
 	if (emif_sdram_type(regs->sdram_config) == EMIF_SDRAM_TYPE_DDR3) {
-		udelay(1000);
 		writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36) |
 		       0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
 		writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw) |
-- 
2.8.1